A Passive Estimation Method of Scattering and Intrinsic Absorption Parameters From Envelopes of Seismic Ambient Noise Cross-Correlation Functions

被引：18

作者：

Hirose, Takashi ^{[1
]}

Nakahara, Hisashi ^{[1
]}

Nishimura, Takeshi ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Geophys, Sendai, Miyagi, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2019年 / 46卷 / 07期

基金：

日本学术振兴会;

关键词：

scattering mean-free path; intrinsic absorption parameter; seismic interferometry; SAKURAJIMA VOLCANO; MECHANICAL CHANGES; ATTENUATION; JAPAN; TRANSPORTATION; ENERGY; WAVES; CODA;

D O I：

10.1029/2018GL080553

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present a passive method to estimate the scattering and intrinsic absorption parameters of Rayleigh waves. Envelopes of seismic ambient noise cross-correlation functions are calculated using the temporal flattening technique, and these parameters are estimated by modeling their space-time distributions using radiative transfer theory. The scattering mean free paths are estimated to be 1.6-2.4 km at 0.5-1 Hz, 1.6-2.0 km at 1-2 Hz, and 1.6-3.2 km at 2-4 Hz at the Sakurajima volcano, Japan. Intrinsic absorption parameters are 0.04-0.06 s(-1) at 0.5-1 Hz, 0.08-0.09 s(-1) at 1-2 Hz, and 0.16-0.18 s(-1) at 2-4 Hz. We validate these values by conducting a comparative study using active shot records at Sakurajima. Our passive method provides an effective way to measure scattering and intrinsic absorption parameters in various regions.

引用

页码：3634 / 3642

页数：9

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